GE Lighting 10574 - F13DBX23T4/SPX30 - 13 Watt CFL Light Bulb - Compact Fluorescent - 2 Pin GX23-2 Base - 3000K - GE F13DBX23T4/SPX30 GE Biax T4 Compact fluorescent bulb Base: GX23-2, Bulb: T4, Wattage: 13w, Initial Lumens: 810 Rated Life: 10000 hrs